Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 6d0338a80ec7660f…

MALICIOUS

Office (OLE) / .XLS

380.5 KB Created: 2015-06-05 18:19:34 Authoring application: Microsoft Excel
MD5: dacfb63f498a5034728c70e375ecf2e2 SHA-1: 8f1a29f55b606da64fea775d10b51f5c2ac146de SHA-256: 6d0338a80ec7660fa5fb2fe7448caa2e3a75e9464fe712e1ab550fb6c62597d2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1204.002 Malicious File

The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet that contains an Auto_Open macro. The macro attempts to lure the user into enabling macros, a common tactic to bypass security. It then proceeds to download and execute a second-stage payload from one of the two embedded URLs, likely 'https://hermescomm.net/x9NvrhL0/lena.html' or 'https://asistenciajuridicaintegral.com/6YiCkNix5/lena.html'. The extracted commands like CALL, RUN, LOAD, and EXEC indicate the execution of downloaded code.

Heuristics 4

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://hermescomm.net/x9NvrhL0/lena.html
    • https://asistenciajuridicaintegral.com/6YiCkNix5/lena.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
be629cb484f8d82e38c4234ddbad4f1755e762b9c1c8359642d99f8c77e6e858		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 8812 bytes

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